Technology for producing anticorrosive materials from fat-containing waste

The processing of fat-containing waste from meat-packing enterprises that cannot be landfilled is an urgent problem. The authors developed the technology of processing fat-containing waste in a chemical reactor in one step, without dividing the technology into two steps: triglyceride hydrolysis and fatty acid amide production. The technology for processing fat-containing waste was tested in a laboratory plant. The target product obtained was analyzed using IR spectroscopy. As a result, the structural formula was clarified, functional groups were determined, and chemical intermediates in the synthesis process were identified. The proportions of the reagents were determined: technical fat in the amount of 65.3-72.4 wt%, monoethanolamine – 14.5-17.0 wt% and boric acid – up to 100 wt% of the mixture. The reaction time was 1.5 h. The protective effect was selected as a quality control indicator of the surfactant obtained. Solvent selection was carried out for producing anticorrosive materials. I-20 industrial oil, diesel fuel and SN-150 oil were selected as solvents. Electrochemical studies carried out on the AVTOLAB PGSTAT302N potentiostat-galvanostat made it possible to determine the mechanism of action of the surfactant as a corrosion inhibitor. Its optimum concentration was found to be 15%, with a protective efficiency of 99.33%. To increase the protective anticorrosive efficiency of the surfactant, the tests were carried out in a humidity chamber for 60 days on St3 steel plates. The test results showed high efficiency of the surfactant used as a corrosion inhibitor, with the Z value of more than 90%.

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